Always talk with your doctor before taking any medications.
Most medications pass into your milk in small amounts. If you take medication for a chronic condition such as high blood pressure, diabetes or asthma, your medication may already have been studied in breastfeeding women, so you should be able to find information to help you make an informed decision with the help of your doctor. Newer medications and medications for rare disorders may have less information available. The American Academy of Pediatrics has information about many prescription and over-the-counter medications posted on their web site at: www.aap.org.